纵向强非均质性储层水平井提高油层钻遇率技术

水平井开发可以提高油藏单井产量和整体开发效益,但前提是水平井要获得较高的油层钻遇率。对于常规油藏水平井开发获得较高的油层钻遇率较为容易,但对于像ML油田长8油藏这种纵向强非均质性储层,难度较大,现场随钻跟踪工作也极为棘手。水平井开发主力层优选一般以定性化方法居多,定量化技术方法研究较少。从影响强非均质性储层主要测井参数的电阻率、声波时差等出发,结合水平井轨迹设计实际需求,提出了小尺度范围内储层纵向主力产层精细优选技术。2015年以来,水平井地质设计大规模应用定量化主力生产层段优选技术,在水平井水平段轨迹调整中,应用三维地质建模随钻跟踪和RDMS水平井随钻远程监控技术,在ML等油田矿场实践中获得了理想的应用效果。

Technology of increasing oil drilling rata in horizontal well with vertical strong heterogeneity reservoir

The development of horizontal well can improve the productivity of single well and the overall development benefit,but the premise is that the horizontal well has a higher drilling rate. Higher drilling rate is relatively easy for the development of horizontal wells in conventional reservoir,which has inherent advantage,but it is difficult for the reservoir with strong heterogeneity,such as the Chang 8 reservoir of ML Oilfield. At the same time, site tracking while drilling is also very tricky. According to the literature research, the main layer selection of horizontal well development is mostly qualitative method, and the quantitative method is less.From the resistivity and acoustic time difference of the main logging parameters that affect the heterogeneity of the reservoir,and combined with the actual needs of horizontal well trajectory design,this paper presents a fine optimization technique of the longitudinal main production layer in a small scale. Since 2015, in the ML oil field ,the practice application effect is ideal, because of the horizontal well design in large-scale application of quantitative main production layer optimization technology, and the application of 3D geological modeling while drilling and RDMS horizontal well drilling technology of remote monitoring and control system in horizontal section trajectory adjustment.